How did Sai Baba use a simple object like grapes to perform a miracle and teach a lesson to a devotee?

In the narrative from Chapter 35, Sai Baba masterfully used simple grapes to impart a deep spiritual lesson to the skeptical Boss Dharamsee. The grapes, which had seeds and were unwashed, became a focal point for Dharamsee's doubts and dislikes. He was troubled by them, feeling it was difficult to eat them but also wrong to reject them. Baba, aware of his inner turmoil, first gave him more grapes, intensifying the test. Then, by commanding him to eat and miraculously turning the seeded grapes into seedless fruit, Baba addressed Dharamsee's specific, internal skepticism directly. As Chapter 35 recounts, Dharamsee was amazed, realizing, "Knowing the intent of my mind... Whatever Sai gives me, they turn out to be seedless and beneficial." This miracle demonstrated Baba's omniscience and power, transforming a mundane object into a catalyst for profound faith.